Neutrophil Count (Absolute)
This test measures the number of neutrophils, a type of white blood cell that helps fight infections.
["Neutrophils are key defenders against bacterial infections."]
Key facts at a glance
- LOINC
- 52129-4
- Short code
- INR p hep neut PPP
- Synonyms
- INR p hep neut PPP
- Category
- chemistry
- Sample
- plasma
- Container
- Lavender-top (EDTA) or Green-top (Heparin)
- Units
- N/A
- Ref low
- 0.8
- Ref high
- 1.2
- Critical range
- — – 5 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- coag-tissue-factor-induced-inr-post-heparin-neutralization
- CPT
- 85610
- SNOMED
- 396252006
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What Neutrophils Do in Your Body
Neutrophils are a critical part of your immune system. They quickly respond to infections caused by bacteria and some viruses. When your body detects harmful bacteria, neutrophils rush to the site to destroy them. High levels may indicate an active infection, while very low levels could suggest immune issues or certain medical conditions.
When Might You Need This Test?
Your doctor may order a neutrophil count if you have symptoms like frequent or severe infections, unexplained fevers, or signs of inflammation. It’s also checked during evaluations for blood disorders, autoimmune diseases, or before certain treatments that affect the immune system.
How Is This Test Done?
A small sample of your blood is taken from a vein, usually in your arm. The sample is sent to a lab where it’s analyzed to count the number of neutrophils. This test is quick and painless, similar to other routine blood tests.
What Could High or Low Neutrophils Mean?
High neutrophil counts often signal an infection, inflammation, or stress response. Low counts may indicate immune suppression, certain cancers, or conditions like leukemia. Your doctor will consider your symptoms and other test results to interpret the results.
Reference range
INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A
Inform your healthcare provider if you are taking blood thinners. No special preparation required.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Neutrophils play a vital role in protecting your body from bacterial infections. Abnormal levels can signal underlying health issues, such as chronic infections, autoimmune disorders, or conditions affecting blood cell production. Regular monitoring can help manage these conditions effectively.
Short name
Neutrophil Level
Frequently asked questions
Why might my neutrophil count be higher than usual?
What if my neutrophil count is very low?
Do I need to prepare for this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy